Electric switch.



L. G. GOPEMAN.

ELECTRIC SWITCH.

APPLICATION FILED DBO. 23, 1911.

1,069,531 Patented Aug. 5, 1913.

717- 77 eases" v [fig an far Zia v 1. G'roff Copeman /M V W LLOYD GEOFFCOPEMAN, OF FLINT, MICHIGAN.

ELECTRIC SWITCH.

Specification of Letters Patent.

Patented Aug. 5,1913.

Application filed December 23, 1911. Serial No. 667,529.

T 0 all whom it may concern:

Be it known that I, LLOYD GEOFF COPE- MAN, a citizen of the UnitedStates of Amer ica, residing at Flint, in the county of Gen esee andState of Michigan, have invented certain new and useful Improvements inElectric Switches, of which the following is a specification, referencebeing had therein to the accompanying drawings.

The invention relates to electric switches being more particularlydesigned for use in connection with automatically operating switchclosing mechanism.

It is the object of the invention to obtain a simple construction ofsnap switch which may be set in the path of the actuating member so thata slight movement will cause it to snap closed.

In the drawings, Figure 1 is a longitudinal section through the switchas arranged in connection with a time controlled switch actuatingmechanism; Fig. 2 is a perspective view of the switch.

A is a base of any suitable construction, B and C are the contactmembers mounted on said base, and D are the blades of the knife switchhinged to the contacts 0 and adapted to close with the contacts B.

E is' the insulator cross bar between the blades and F is the actuatinghandle. Attached to the cross bar E is an outwardly projecting finger Gto which is attached a spring H. The other end of this spring isattached to a hook I which is mounted upon the base intermediate theknife blades. The

location of the points of attachment is such that when the blades of theswitch are open or out of contact with the members B, the sprin H willbe in the plane of the axis of the hinge, and therefore, will have notendency to move the blades in either direction. If however, the bladesare moved a slight distance beyond this neutral position the tension ofthe spring will at once be exerted to snap the switch closed.

As shown in Fig. 1, J indicates a rotatable arm secured to a clock orother timed mechanism (not shown), and which when actuated will passthrough an orbit into which the handle F of the switch projects. Thusthe movement of the member J will actuate said handle F sufficiently tothrow the spring H over from its neutral position, whereupon the switchwill snap closed.

The construction can be applied to any ordinary or standard constructionof knife switch and involves but very slight additional expense.

l Vhat I claim as my invention is:

1. A switch comprising an insulator base, pairs of contacts mountedthereon, a pair of knife blades hinged to two of said contacts andadapted to bridge with the operating contacts, an insulator cross-barconnecting said knife blades, a projection extending rearwardly from andcarried by said crossbar, a spring attached to the outer end of saidprojection, spring secured to said base, said projection being of alength'to aline the spring with the axis of the blades when the latterare in slightly open position.

' 2. A switch comprising an insulator base, pairs of contacts mountedthereon, a pair of knife-edge blades hinged to two of said conand ananchor for said tacts and adapted to bridge with the operating contacts,an insulator cross-bar connecting sa1d knife-edge blades, a handlesecured to said cross-bar, a spring anchored. at one end of the baseintermediate the knlfe blades and to the rear of the axis thereof, ahandle LLOYD GEOFF COPEMAN.

Witnesses WM. 0. STEWART, EVERETT L. BRAY.

